There are several places where you can sell custom t-shirts online. One of the oldest is CafePress, but I wasn’t too happy with their t-shirt designer. Essentially, you upload an image, but you have no control where that image appears on the shirt. Plus CafePress had bad reviews on the quality of their shirts.

TeeSpring has both an online designer, as well as the option to upload images. For that first shirt I linked above, I just used their online designer. For my first “real” design, I used Inkscape (which I found had a small learning curve), added an image I got from The Noun Project, and finished it off in Paint.net. My second and third designs (which are almost identical) I just made in Paint.net.

I am Joe. I'm one of many Joes, but I am uniquely me. I'm the messiest organized guy you'll ever meet. My glasses are always bent and my hair always a mess. I've never had a role model and as such am my own person. Scientist, programmer, Christian, libertarian, and life long learner.